What does an MC-331 cargo tank typically carry?

• A. Liquefied hydrocarbons
• B. Solid materials only
• C. Liquefied compressed gases like propane
• D. Flammable solids

Answer: (C)

An MC-331 cargo tank is specifically designed to transport liquefied compressed gases, such as propane and butane. These tanks are built to handle substances that are in a liquid state under pressure and can vaporize when released into the atmosphere. The design features and construction materials of an MC-331 tank make it suitable for maintaining the integrity of these gases during transport.

Understanding the nature of the cargo tank's contents is crucial for ensuring safe handling and compliance with regulatory requirements. Liquefied hydrocarbons fall under the category of what the MC-331 can carry, but the designation more specifically pertains to compressed gases that are stored in a liquefied form due to pressure. The other choices involve materials that do not align with the MC-331's intended purpose, as they either pertain to solids or other types of liquids that would require different types of tank designs that are not suitable for handling gases under pressure.